I've got an iPhone 6 on iOS 10 public beta and at first my T-Mobile Wifi did not work but after I turned it off and back on in settings and shutdown / restart it kicked back on. Try that and see if the works.

I've got an iPhone 6 on iOS 10 public beta and at first my T-Mobile Wifi did not work but after I turned it off and back on in settings and shutdown / restart it kicked back on. Try that and see if the works.

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I actually got it to work after when I installed iOS 10 the second time.

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